On the Norian or "Upper Zaurentian" Formation. 437 



I. & II. Large fragments of reddish plagioclase from the 

 anorthosite of Chateau Eiclier. (T. S. Hunt, Geo- 

 logy of Canada, 1863). 

 III. Fine-grained plagioclase ground mass, in which 

 the former are imbedded. {Ibidem). 

 IV. &Y. Hypersthene from the same rock. (Ibidem). 



VI. Ilmenite from the same rock, with 4*9 p.c. of 

 insoluble matter, quartz, etc. (Ibidem). 

 VII. Bluish plagioclase in large fragments from another 

 hand-specimen of the Chateau Eicher anorthosite 

 occurring imbedded in a fine granular ground mass 

 of plagioclase. (Ibidem). 

 VIII. Similar plagioclase from an anorthosite boulder 

 from the neighbouring parish of St. Joachim. 

 (Ibidem). 

 IX. Very fine grained, almost white anorthosite, from 

 Eawdon (Morin area). (Ibidem). 

 X. Blue opalescent plagioclase from the Morin anor- 

 thosite. (Ibidem). 

 XI. Bluish opalescent plagioclase from the summit of 

 Mount Marcy in the State of New York, U.S.A. 

 (A. E. Leeds, 13th Ann. Eep. New York State 

 Museum of Natural History, 1876). 

 XII. Very fine-grained yellowish anorthosite from the 

 State of New York, U.S.A. (Ibidem). 

 XIII. Hypersthene from the anorthosite of Mount Marcy 



in the State of New York, U.S.A. (Ibidem). 

 XIV. Diallage from anorthosite, New York State, LLS.A. 

 (Ibidem). 

 XV. Labrador feldspar, Pauls Island, Labrador. (G. 

 Tschermak, in Eammelsberg's Mineralchemie). 

 XVI. Labrador feldspar, Pauls Island, Labrador. (Ibidem). 

 XVII. Plagioclase from a fine-grained whitish anortho- 

 site from Labrador (granular ground mass). ( H. 

 Vogelsang, Archives Nierlandaisas, T. III., 1868). 



